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上完北师大版《视图与投影》一章后,对教参书中关于两个问题的处理总有几分疑虑,在具体的教学处理过程中,颇感为难,与几位同行探讨,也有同感.现不
After finishing the chapter on “Views and Projection” of Beijing Normal University’s edition, there was always some misgivings about the handling of the two issues in the textbook. In the specific teaching process, it was difficult to understand and discussed with several colleagues. Also feel the same.